Bushing retaining means for rotaries



Feb. 2, 1932. E. E. GREVE BUSHING RETAINING MEANS FOR ROTARIES Filed July 20, 1928 2 Sheets-Sheet INVENTOR Feb. 2, 1932. E. E. GREVE BUSHING RETAINING MEANS FOR ROTARIES Filed July 20, 1928 2 Sheets-Sheet 2 Patented Feb. 2, 1932 uNrrEn STATES,

PATENT OFFICE,

EDGAB- E. GREVE, or BELLEVUE, rnNNsYLvAniA, AssIeNonjBY ivrnsnn ASSIGNMENTS,

TO OIL WELL SUPPLY COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATIQN- OF NEW JERSEY BUSHING RETAINING vrnnrrs'ron :eornmns A Application filed July 20,

This invention relates to rotary drilling apparatus and more particularly to rotary drilling apparatus of the character in which a plurality of bushings'are nested within the gear or drive'ring of the rotary-table.

In rotaries of the class mentioned considerable trouble has been experienced, during the drilling operation -in keeping'the bushings, for example, the drive bushing and the grief-stem bushing from being raised out of'the drive ring or table or moving out of the desired operative positions within the table. The prime object of the present invention is to provide simple, strong and efficient means designed to cooperate with the rotary table for maintaining the bushings in the desired positions during drilling operations. 7 Other objects and advantages of my invention will be either specifically hereinafter referred or will be apparent from a consideration of the following description taken in connection with the drawings. p In the accompanying drawings which illustrate applications of my invention:

Fig. 1 is a top plan View of a table of a 1'0- tary drilling tion; 1

Fig. 2 is an enlarged detail top plan view a aratus embod in m inven- "particularly showing a plurality of bushings and a retaining bar or member shown in connection therewith; v

Fig. 3, an enlarged sectional viewof apolition of atable and concentrically assembled bushings, with the bushing looking or retaining means shown in elevation;

Figs. 4 and 5, detail views partly in section and partly in elevation particularly showing the locking means for the bushing retaining bars ormembers ofthefform of Fig. 6, a detailplan view of a portion of a retaining member showing a modified form of locking means; a

Fig. 7, a detail viewparticularly showing 1928. Serial No. 294,220.

the form of Fig. 6 applied tion to the table; and

Fig. 8, a detail view similar to Fig. 7 showing the said means in unlocked position.

Referring to the drawings, 5 designates the rotary table of a rotary drilling appa-" ratus or it may indicate the element of the rotary table commonly called the drive gear ring. 6 and? designate sectional bushings disposed in .the table and usually termed drive bushings and grief-stem bushings respectivelocking means as hereinafter described. 11 designates openings to receive posts, not

shown, employed for carrying a tong, not shown. I

In use,two retaining bars or members 10 are employed. The manner of assembling said members relatively to the rotary and its bushings is shown by Fig. 1. preferably of channel shape in cross-section and formed at its respective ends, with 'depending hook members 12 and 13'adapted to be entered in a pair of openings 8 and'9. Adjacent'the hook'member 12, the bar 10 is provided with a handle 14: and associated with the other book member 13, I'provide a locking means designated generally by 15 and an ad- 'ditional handle portion 16 similar to 14;.

"Locking means 15 is designed to be pivot in locked posi- I Members 10 are each ally mounted on an end ofthe retaining memsansigned tobe entered-.in-an opening 9a having: a slantingor inelinedwa-llb andzi's preferably. 1 providedrwithla tapered end-portion 31. In

provided-withopenings 2 1 throughwhich thev pin is passed;

I11 operation, the hook members 12and 13 V are inserted in their respective openings and the'rbar movedto the i le ftf the 1 locking means being. in the postion of Fig. 5. Upon ro tating said means, the cam members 21 en-' gage the curved walls a of the slots, thereby securing the bar and thebushingsagainst up ward movement.

In the form of Fig. 6 the retaining bar lockinga meanstdi ffers slightly from that ref Fig 1; in this latter form, I mployal-inkor lever 25ihaying-a handle portion 26,'said link being fulcrumede qto.. -the..bushi-ng vretaining bar a by a pi;n,27;. Member==carries-a loosely mounted. wedge member--28, the latter-being secured to-theasaid' member-25. by a pin conneetion -.-;29{.I11Q11I1t6d;=111- an elongated-slot .30-

fomned in .member 25. Member 28 :is dethiS-nform :the bushing .retaining1rmember is prpvided with hook--end members similar =to' thelmembers- ;12 .and 13-o'f the form of Fig. '1;

13a. .wdes'ign atesfiones of these -members, the other-hook member; notbeingshown.

The actionof the-modified lookinganeans is similar-to thiliksPIGV-IOUSIY described.

In. applying. the retaining members tothe rotaryga memben is -graspedby the handles and ,mevedso that zthe-hook portions" 12. and

13 areioventhe respective.openingSLS and9 ofi-the table; saidportions 12'and 13 areth'en '-:entered.-in1-theaopeningswand' the. member 10. moved to the left or into the postion particula r-ly shown by Fig. 1.3. .Wl1enpositioning said member 10 as above stated,.thelocking means: 15 is in. the position shown by Fig. -5.

oving theloeking means from the positlon'otFig. to'thepositionofFig; 3, it will benotedthatthe. eammembers 21 engage the curved wall. a of the opening .9, thereby effect mg an e-iiicient locking of member lO to the. rotary, and maintaining the member 10 in the desired position-relatively to thegbushings to prigilent theabushings being raised -fro1nthe ta e...

It will .bereadily nnderstoodthat in apply-i --'1ng.the form of-Fig. .6 to a rotary, substantiall pthecsame method is followed as in ap plylng. form-of Fig. 1. In-both'forms'the bushingnretaining .member-- is locked in -"p0- sition byea =wedging action-of the locking =meansa ...The retaining membeismayberead ily removed from the rotary by reversing the direction of movement of the locking means and then hfting said members free of the rotary.

the table-engaging faces of the depending hook members 12, 13 and 13a are in a plane parallel with and extend in the same direction as the body 10, thereby enabling the locking means to be positioned at one end only of thesaid. memberlO.

What I claim is:

1. The combination with a rotary table, of

bushingretaining means including a member having end depend-mg tab-le' engaging means and extending over the bushing'receiving opening 01": the table and over the contained bushings, said tab'l'ehaving openings to receive thedepending engaging means, and a wedge acting locking means on said member for: loeki'ngtheretamingmember to the table.

2.1.The "combination: with a rotary table, of

It will be noted that in both forms shown bushing retaining means includinga member disposed over-a bushingdisposedin the table, said table and retaining memberwhavlngvcooperatingnengaging :means, and. Wedge acting locking-means carried by the :retaining member for looking the retainingmember to:

the table.

3. =The combination with a rotary table, of

bushingretainingmeans including a member dISIJOSQd-IOVGI a bnshingdisposed in the table,"

said table and retaining member'havingrcd operating; engagingysimeans and locking means vcarried by the retaining member for locking the retainingamember to the -table,

said: tablewhaving "anopening ito receive a portion: of the retaining. member and a por-' tion of the locking means. i.

l. A bushing retaining memberha-ving deiendin uend members-ada ted to'en a 'eua b b b rotary table, and :wedge acting locking means carried by the retaining memberi andcooper= ating -with the .table forv lockingthe retaining member thereto;

5. A bushing'retaining member having depending-end members adapted to engage. a

the retaining member; said locking 'fmeans being pivotally mountedonthe 1 retaining:

member;= r

6. A bushing retainingmember for aro tary table comprising anelongated 'bodyhaving'. spaceddevices-depending therefrom forengagingsbeneath. portions of the table, and- -1neans for wedging-a device in place tolockv: the bushing: retaining ,member against--displacement.

7. A bushingvretaining member' for a ro-" tary table compr singanelongated body having spaced hooks dependlng therefrom for engaging i-beneath portions of the table," and :rotary table, and locking means carriedby' means for wedginga hook 'iniplacento {look P the bushing retalning member-against dis placement, :said books 1 extendingwin the same direction so as to engage the table by the same movement of the bushing retaining member.

8. A bushing retaining member for a rotary table comprising an elongated body for 5 spanning a bushing receiving opening in the 

